Table 2.

Goodness-of-fit statistics for the CFA models of the Portuguese OCDQ-RE (N = 687)

	χ2	df	χ2/df	CFI	TLI	SRMR	RMSEA	90% CI	AIC	BIC	df, $\Delta$ χ2	Model comparison
CFA for the original structures tested (42 items)
Model A	5688.505***	819	6.95	0.57	0.55	0.11	0.09	[0.09, 0.10]	67347.218	67459.993
Model B	2398.691***	804	2.98	0.86	0.85	0.08	0.05	[0.05, 0.06]	64087.404	64220.318	15, 3289.8***	Model A
Model C	2512.689***	812	3.09	0.85	0.84	0.08	0.06	[0.05, 0.06]	64185.402	64307.576	8, 114.0***	Model B
Model D	2517.763***	813	3.10	0.85	0.84	0.08	0.06	[0.05, 0.06]	64188.476	64309.307	1, 5.074*	Model C
Model E	3322.088***	819	4.06	0.78	0.77	0.15	0.07	[0.06, 0.07]	64980.801	65093.577	6, 804.32***	Model D
CFA for the re-specified models (40 items and modification indices)
Model A	4931.377***	735	6.72	0.63	0.61	0.11	0.09	[0.09, 0.09]	63223.542	63337.661
Model B	1883.267***	720	2.61	0.90	0.90	0.07	0.05	[0.04, 0.05]	60205.433	60339.689	15, 3048.1***	Model A
Model C	2026.537***	729	2.78	0.89	0.88	0.07	0.05	[0.05, 0.05]	60330.702	60452.876	9, 143.27***	Model B
Model D	2005.299***	729	2.75	0.89	0.88	0.07	0.05	[0.05, 0.05]	60309.465	60431.638	0	Model C
Model E	2819.413***	735	3.84	0.82	0.81	0.15	0.07	[0.06, 0.07]	61111.579	61225.697	6, 814.11***	Model D

χ² = Chi-squared test; df = degrees of freedom; CFI = Comparative Fit Index; TLI = Tucker-Lewis Index; SRMR = Standardized Root Mean Square Residual; RMSEA = Root Mean Square Error of Approximation; AIC = Akaike Information Criteria; BIC = Bayesian information criteria. Model A (unidimensional structure), Model B (six first-order factors structure), Model C (two second-order factors each with three first-order factors each), Model D (one second-order factor with six first-order factors), Model E (bifactor model). * p < .05, *** p < .001